#define SHMLBA 4096

struct shmid_ds {
    struct ipc_perm shm_perm;
    size_t shm_segsz;
    time_t shm_atime;
    time_t shm_dtime;
    time_t shm_ctime;
    pid_t shm_cpid;
    pid_t shm_lpid;
    unsigned long shm_nattch;
    unsigned long __pad1;
    unsigned long __pad2;
};

struct shminfo {
    unsigned long shmmax, shmmin, shmmni, shmseg, shmall, __unused[4];
};

struct shm_info {
    int __used_ids;
    unsigned long shm_tot, shm_rss, shm_swp;
    unsigned long __swap_attempts, __swap_successes;
};
